Investigations into the Laser Ablation Process and the Pursuit of New Chemical Applications

弗吉尼亚大学的莱斯特·安德鲁斯得到了实验物理化学项目的资助，继续他的激光烧蚀光谱研究，以获得与氢分子和一氧化碳聚集在一起的一系列过渡金属配合物（带正电、负电和中性）的吸收光谱和振动频率。这是通过激光烧蚀含有适当种类的Ne矩阵来实现的，光谱是通过傅里叶变换红外光谱获得的。光谱鉴定将通过同位素取代和使用密度泛函理论的理论计算来实现，并将与理论预测进行比较。例如，这项工作将确定氢是否以分子形式结合，还是与金属原子形成二氢化物。这类物质参与了有机金属化学中许多重要的反应。有人提出用金属羰基簇生长碳纳米管是可能的。这种簇和含氢簇参与了许多有机金属离子反应，如氨的合成。这些星团的性质将用光谱法确定，并与理论计算进行比较。

Lester Andrews of the University of Virginia is supported by a grant from the Experimental Physical Chemistry Program to continue his spectroscopic studies of laser ablation to obtain absorption spectra and vibrational frequencies of a series of transition metal complexes (positively and negatively charged and neutral) clustered with molecular hydrogen and carbon monoxide. This is achieved using laser ablation of Ne matrices containing the appropriate species, with the spectra being obtained by Fourier transform infrared spectroscopy. Spectroscopic identification will be achieved by isotopic substitution and theoretical calculations using density functional theory and comparisons will be made with the theoretical predictions. The work will establish, for example, whether the hydrogen is bound in molecular form or if it forms a di-hydride with the metal atom. Such species are involved in many important reactions in organometallic chemistry.It has been suggested that it may be possible to grow carbon nanotubes using metal carbonyl clusters. Such clusters, and clusters with hydrogen, are involved in many organometallic ion reactions such as synthesis of ammonia. The properties of these clusters will be determined spectroscopically and compared with theoretical calculations.